How is the Lichtenstein incision performed for open tension‑free inguinal hernia repair?

Lichtenstein Technique for Open Tension-Free Inguinal Hernia Repair

The Lichtenstein technique involves making an oblique inguinal incision, dissecting to expose the inguinal canal, identifying and managing the hernia sac, and placing a flat polypropylene mesh over the posterior wall to reinforce the transversalis fascia and oblique muscles in a tension-free manner. 1, 2

Surgical Steps

Incision and Exposure

• Make an oblique skin incision approximately 2-3 cm above and parallel to the inguinal ligament, extending from the pubic tubercle laterally toward the anterior superior iliac spine 3
• Dissect through subcutaneous tissue and Scarpa's fascia to expose the external oblique aponeurosis 1
• Open the external oblique aponeurosis along the direction of its fibers to expose the inguinal canal 2

Neuroanatomical Assessment

• Identify and preserve the ilioinguinal, iliohypogastric, and genital branch of the genitofemoral nerves during dissection to prevent chronic postoperative pain 3
• Consider pragmatic neurectomy (prophylactic nerve division) if nerve identification is difficult or if the nerve is at risk of entrapment, as this may reduce chronic pain risk 3

Spermatic Cord and Hernia Sac Management

• Mobilize the spermatic cord structures carefully, preserving the vas deferens and testicular vessels 4
• Identify the hernia sac (indirect hernias emerge lateral to the inferior epigastric vessels; direct hernias protrude medially) 2
• For indirect hernias, dissect the sac from cord structures and either reduce or ligate at the internal ring if large 3
• For direct hernias, reduce the sac or invert it without formal dissection 4

Mesh Placement and Fixation

• Use a flat polypropylene mesh measuring approximately 8 x 15 cm to ensure adequate coverage with at least 3-4 cm overlap beyond the hernia defect 2, 3
• Create a slit in the lateral portion of the mesh to accommodate the spermatic cord 4
• Position the mesh to cover the entire posterior inguinal floor, extending from the pubic tubercle medially to beyond the internal ring laterally 2

Critical technical point: The mesh must overlap the pubic tubercle by at least 2 cm to prevent medial recurrence, as three of four recurrences in the original Lichtenstein series occurred from inadequate medial coverage 2

Fixation Technique

• Fix the lower border of the mesh to the inguinal ligament using interrupted or running non-absorbable sutures, extending from medial to the pubic tubercle to lateral beyond the internal ring 4
• For complex or recurrent hernias, extend fixation to Cooper's ligament medially to protect against femoral hernia recurrence 4
• Secure the superior edge to the internal oblique muscle and conjoint tendon with interrupted sutures 2
• Create a new internal ring by crossing the mesh tails around the spermatic cord and suturing them to the inguinal ligament, ensuring the ring admits a fingertip to prevent cord compression 4

Femoral Canal Assessment

• Palpate the femoral canal through the inguinal approach to exclude concurrent femoral hernia, which occurs in up to 5% of cases 3

Anesthesia Considerations

• Local anesthesia is highly effective for Lichtenstein repair and reduces cardiac complications, respiratory complications, ICU stay, hospital stay, and costs compared to general anesthesia 5
• The technique can be performed under local anesthesia in 71% of cases, making it suitable for outpatient surgery 4
• Reserve general anesthesia for cases with suspected bowel gangrene requiring resection or when peritonitis is present 5

Mesh Selection

• Synthetic polypropylene mesh is recommended for clean surgical fields (CDC Class I), as it significantly reduces recurrence rates compared to tissue repair without increasing infection risk 5
• The mesh should be placed with appropriate laxity (not under tension) to prevent recurrence from mesh disruption 2

Clinical Outcomes

• Recurrence rates are significantly lower (0.1-0.4%) with proper technique compared to tissue repair, and comparable to laparoscopic approaches 1, 2
• The technique has a rapid learning curve and low cost, making it accessible worldwide 1
• Complications include: hematoma (1.86%), chronic pain (1.7%), ischemic orchitis (0.48%), and testicular atrophy (0.16%) 4

Common Pitfalls to Avoid

• Inadequate medial coverage: Ensure mesh overlaps pubic tubercle by ≥2 cm to prevent medial/direct recurrence 2
• Mesh too narrow: Use adequate mesh width (≥8 cm) to avoid tension on lower border fixation 2
• Tight internal ring: New internal ring must admit fingertip to prevent cord ischemia 4
• Nerve injury: Identify nerves early and consider prophylactic neurectomy if preservation is difficult 3